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What is the easiest way to push an element to the beginning of the array?
...elf, moving other elements upwards.
And in use:
irb>> a = [ 0, 1, 2]
=> [0, 1, 2]
irb>> a.unshift('x')
=> ["x", 0, 1, 2]
irb>> a.inspect
=> "["x", 0, 1, 2]"
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数据结构、算法复杂度一览表 - 更多技术 - 清泛网移动版 - 专注C/C++及内核技术
...数组作为优先队列)
图G(V,E), V为顶点集, E为边集
O(|V|^2)
O(|V|^2)
O(|V|)
Bellman-Ford最短路径算法
图G(V,E), V为顶点集, E为边集
O(|V||E|)
O(|V||E|)
O(|V|)
排序算法(来源)
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round up to 2 decimal places in java? [duplicate]
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12 Answers
12
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Is there a way to perform “if” in python's lambda
In python 2.6 , I want to do:
16 Answers
16
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How do you use the ellipsis slicing syntax in Python?
...%r items" % item
...
>>> x = TestEllipsis()
>>> print x[2]
return 2 items
>>> print x[...]
Returning all items
Of course, there is the python documentation, and language reference. But those aren't very helpful.
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How to format a float in javascript?
...n JavaScript, when converting from a float to a string, how can I get just 2 digits after the decimal point? For example, 0.34 instead of 0.3445434.
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How to print to console in pytest?
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226
By default, py.test captures the result of standard out so that it can control how it prints i...
Undo working copy modifications of one file in Git?
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2263
You can use
git checkout -- file
You can do it without the -- (as suggested by nimrodm), b...